One of the best things is getting to see new and creative takes on beloved characters. Fanfiction can explore storylines and relationships that the original show didn't have time for.
Hard to say exactly without reading it, but it could be that the Unerathyl Child has some special ability or connection to a greater threat. The Doctor might have to protect the child and the universe from whatever danger it brings. Maybe there are timey-wimey elements involved too!
It could be special because it adds emotional depth to the story. Maybe it creates new relationships or delves deeper into the backstories of existing characters. It might also have more complex plot twists and turns that keep readers engaged.
You might find stories that expand on the relationships between the characters or take the plot in unexpected directions. Fanfiction writers have a lot of creative freedom to play with the source material and come up with unique takes.
Well, it could bring in fresh perspectives and interpretations of the characters and events from series 2. Sometimes there might be alternate endings or expanded backstories.
When watching such fanfiction, you might encounter unique story arcs that build upon the existing themes and concepts of series 10. It could offer fresh perspectives and imaginative scenarios that expand the Doctor Who universe in exciting ways.
You can expect a lot of creativity and different takes on the original series. Fanfiction often explores uncharted storylines and character developments.
Well, it varies for each fan. Some might enjoy the creativity and alternative takes on the characters and plotlines. Others might find it doesn't quite match their expectations of the show.